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The torque specs, of all bolts that require tightening to a specific value, are found in the repair manual of the vehicle that your working on, also most bolts have lines marked on the head that indicate torque value. What are you working on?
Oil bolt threads.
Tighten head bolts in an "X" pattern.
Tighten bolts to 7-9 ft/lbs
Tighten bolts to 12-14 ft/lbs
Using a Sharpie type pen, make a vertical mark on the bolt head and a matching mark on the cylinder head next to it.
Tighten each bolt 1/4 turn, using marks as a guide.
Page 64 of online document should have your information.
The torque order illustrations are at the end of the this online .PDF document. Find your specific vehicle on page 64 and locate the specified torque order diagram number that it shows. Then head to the diagram illustration they posted at the end of the document.
The Mazda T3500 truck requires a specific torque for its bolts. According to [1], it requires a torque of 60 pounds for the first stage, 70 pounds for the second stage, and 80 FT Pounds for the final stage. Additionally, in [2], it is recommended to refer to the STANDARD BOLT AND NUT TIGHTENING TORQUE in Section TD for tightening torques which are not mentioned in the main text. Furthermore, [3] suggests that one should check the oscillation torque of the connecting rod. If the large end does not drop by its own weight, it is important to replace the piston, connecting rod, and/or piston pin.
**References:**
[1] [Torque specs for Mazda T3500 truck - Fixya](https://www.fixya.com/cars/t18472768-torque_specs_mazda_t3500_truck)
The head bolt torque on a 2002 Kia Optima is 45 ft/lbs of torque. Always make sure you use a good torque wrench to get it right. ------------------------------------------------------------------------------------ Original Launch X431 Master
looks like there is special sequence to reassemble and tightening, a quick note replace any bolts that have two punch marks.tighten as follows:
x x x x x
10 4 2 6 8
x x x x x
7 5 1 3 9
torque all down to 15 ft lbs
torque to 30 ft lbs
plus 90 degrees.
Good luck!
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